c# - 将不同的功能收集到一个委托(delegate)

Question

我有不同的函数 我想被彼此调用。都是UI动画，一种是旋转，一种是缩放，一种是移动等等。我希望链接它们，所以在 coroutine 结束时，如果订阅了其他内容，则会触发一个事件。目前，我必须为所有 创建委托(delegate)，这会使代码的扩展难以忍受。如何创建委托(delegate)或委托(delegate)集合？ - 谁的事件可以触发各种功能？

编辑:这些功能彼此不依赖。仅移动移动。旋转仅旋转等等。Move 或 Rotate 只有一个实例可以影响一个组件。

class MoveClass : MonoBehaviour
{
    #region Move
    //to ensure only one mover coroutine can be active.
    public IEnumerator moveRoutine = null;
    /// <summary>
    /// Moves a UnityEngine.GameObject from position A to position B over timeToReachDestination.
    /// Uses Coroutines.
    /// </summary>
    /// <param name="from"></param>
    /// <param name="to"></param>
    /// <param name="overTime"></param>
    public void Move(Transform from, Transform to, float overTime)
    {
        //pull off this shit to ensure only once it will be executed.
        if (moveRoutine != null)
        {
            StopCoroutine(moveRoutine);
        }
        moveRoutine = _Move(from, to, overTime);
        StartCoroutine(moveRoutine);
        //StartCoroutine(_Move(from, to, overTime));
    }
    IEnumerator _Move(Transform from, Transform to, float overTime)
    {
        Vector2 original = from.position;
        float timer = 0.0f;
        while (timer < overTime)
        {
            float step = Vector2.Distance(original, to.position) * (Time.deltaTime / overTime);
            from.position = Vector2.MoveTowards(from.position, to.position, step);
            timer += Time.deltaTime;
            yield return null;
        }
        if(event != null)
        {
            event(/*parameters*/);
            //or loop through the events?
        }
    }
    #endregion
}

Answer 1

似乎您想要在协程结束时进行回调。

IEnumerator _Move(Transform from, Transform to, float overTime, Action /*<Parameter>*/ onCompletion = null)
{
    // Your current code

    if(onCompletion!= null)
    {
        onCompletion(/*parameters*/);
        //or loop through the events?
    }
}

编辑:添加了 onCompletion = null 所以它有默认参数。

考虑到您可能有不同的回调参数列表，您会想出各种重载。公共(public)代码将移动到在所有不同重载中调用的方法，只有最后一部分会有所不同:

void MoveItem(Transform from, Transform to, float overTime)
{
     float step = Vector2.Distance(original, to.position) * (Time.deltaTime / overTime);
     from.position = Vector2.MoveTowards(from.position, to.position, step);
}
IEnumerator _Move(Transform from, Transform to, float overTime, Action onCompletion = null)
{
    Vector2 original = from.position;
    float timer = 0.0f;
    while (timer < overTime)
    {
        MoveItem(from, to, overTime);
        timer += Time.deltaTime;
        yield return null;
    }
    if(event != null)
    {
        event();
    }
}

    IEnumerator _Move(Transform from, Transform to, float overTime, Action <float>onCompletion = null)
{
    Vector2 original = from.position;
    float timer = 0.0f;
    while (timer < overTime)
    {
        MoveItem(from, to, overTime);
        timer += Time.deltaTime;
        yield return null;
    }
    if(event != null)
    {
        event(10.0f);
    }
}

您可以灵活地为 MoveItem 方法提供委托(delegate)，这样您就可以传递任何移动方法(移动的形状可以是线性的、指数的等等)。